CVE-2023-20233

A vulnerability in the Connectivity Fault Management (CFM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to incorrect processing of invalid continuity check messages (CCMs). An attacker could exploit this vulnerability by sending crafted CCMs to an affected device. A successful exploit could allow the attacker to cause the CFM service to crash when a user displays information about maintenance end points (MEPs) for peer MEPs on an affected device.

Score

CVSS 3.1 6.5 Medium

Status

Modified - psirt@cisco.com

Published

2023-09-13

Last modified

2024-08-02

Weaknesses

CWE-354, CWE-476

Affected products

• Cisco Ios Xr Software (Cisco)
• Ios Xr (Cisco)

References

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-cfm-3pWN8MKt